EP0152304A3 - Improvements in apparatus for heat sealing thermoplastic straps - Google Patents

Improvements in apparatus for heat sealing thermoplastic straps Download PDF

Info

Publication number
EP0152304A3
EP0152304A3 EP85300966A EP85300966A EP0152304A3 EP 0152304 A3 EP0152304 A3 EP 0152304A3 EP 85300966 A EP85300966 A EP 85300966A EP 85300966 A EP85300966 A EP 85300966A EP 0152304 A3 EP0152304 A3 EP 0152304A3
Authority
EP
European Patent Office
Prior art keywords
heating element
straps
carriage
carriage assembly
proportional
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
EP85300966A
Other versions
EP0152304A2 (en
EP0152304B1 (en
Inventor
Graham Ford
Donald Sutehall
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
INTERLAKE UK Ltd
Original Assignee
Gerrard Industries Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Gerrard Industries Ltd filed Critical Gerrard Industries Ltd
Priority to AT85300966T priority Critical patent/ATE27434T1/en
Publication of EP0152304A2 publication Critical patent/EP0152304A2/en
Publication of EP0152304A3 publication Critical patent/EP0152304A3/en
Application granted granted Critical
Publication of EP0152304B1 publication Critical patent/EP0152304B1/en
Expired legal-status Critical Current

Links

Classifications

    • BPERFORMING OPERATIONS; TRANSPORTING
    • B29WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29CSHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00General aspects of processes or apparatus for joining preformed parts
    • B29C66/01General aspects dealing with the joint area or with the area to be joined
    • B29C66/05Particular design of joint configurations
    • B29C66/10Particular design of joint configurations particular design of the joint cross-sections
    • B29C66/11Joint cross-sections comprising a single joint-segment, i.e. one of the parts to be joined comprising a single joint-segment in the joint cross-section
    • B29C66/112Single lapped joints
    • B29C66/1122Single lap to lap joints, i.e. overlap joints
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B29WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29CSHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C65/00Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor
    • B29C65/02Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure
    • B29C65/18Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure using heated tools
    • B29C65/20Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure using heated tools with direct contact, e.g. using "mirror"
    • B29C65/2053Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure using heated tools with direct contact, e.g. using "mirror" characterised by special ways of bringing the welding mirrors into position
    • B29C65/2061Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure using heated tools with direct contact, e.g. using "mirror" characterised by special ways of bringing the welding mirrors into position by sliding
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B29WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29CSHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00General aspects of processes or apparatus for joining preformed parts
    • B29C66/01General aspects dealing with the joint area or with the area to be joined
    • B29C66/344Stretching or tensioning the joint area during joining
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B29WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29CSHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00General aspects of processes or apparatus for joining preformed parts
    • B29C66/40General aspects of joining substantially flat articles, e.g. plates, sheets or web-like materials; Making flat seams in tubular or hollow articles; Joining single elements to substantially flat surfaces
    • B29C66/41Joining substantially flat articles ; Making flat seams in tubular or hollow articles
    • B29C66/43Joining a relatively small portion of the surface of said articles
    • B29C66/432Joining a relatively small portion of the surface of said articles for making tubular articles or closed loops, e.g. by joining several sheets ; for making hollow articles or hollow preforms
    • B29C66/4322Joining a relatively small portion of the surface of said articles for making tubular articles or closed loops, e.g. by joining several sheets ; for making hollow articles or hollow preforms by joining a single sheet to itself
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B29WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29CSHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00General aspects of processes or apparatus for joining preformed parts
    • B29C66/40General aspects of joining substantially flat articles, e.g. plates, sheets or web-like materials; Making flat seams in tubular or hollow articles; Joining single elements to substantially flat surfaces
    • B29C66/41Joining substantially flat articles ; Making flat seams in tubular or hollow articles
    • B29C66/43Joining a relatively small portion of the surface of said articles
    • B29C66/432Joining a relatively small portion of the surface of said articles for making tubular articles or closed loops, e.g. by joining several sheets ; for making hollow articles or hollow preforms
    • B29C66/4324Joining a relatively small portion of the surface of said articles for making tubular articles or closed loops, e.g. by joining several sheets ; for making hollow articles or hollow preforms for making closed loops, e.g. belts
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B29WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29CSHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00General aspects of processes or apparatus for joining preformed parts
    • B29C66/40General aspects of joining substantially flat articles, e.g. plates, sheets or web-like materials; Making flat seams in tubular or hollow articles; Joining single elements to substantially flat surfaces
    • B29C66/49Internally supporting the, e.g. tubular, article during joining
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B29WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29CSHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00General aspects of processes or apparatus for joining preformed parts
    • B29C66/80General aspects of machine operations or constructions and parts thereof
    • B29C66/81General aspects of the pressing elements, i.e. the elements applying pressure on the parts to be joined in the area to be joined, e.g. the welding jaws or clamps
    • B29C66/818General aspects of the pressing elements, i.e. the elements applying pressure on the parts to be joined in the area to be joined, e.g. the welding jaws or clamps characterised by the cooling constructional aspects, or by the thermal or electrical insulating or conducting constructional aspects of the welding jaws or of the clamps ; comprising means for compensating for the thermal expansion of the welding jaws or of the clamps
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B29WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29CSHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00General aspects of processes or apparatus for joining preformed parts
    • B29C66/80General aspects of machine operations or constructions and parts thereof
    • B29C66/84Specific machine types or machines suitable for specific applications
    • B29C66/861Hand-held tools
    • B29C66/8618Hand-held tools being battery operated
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B29WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29CSHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00General aspects of processes or apparatus for joining preformed parts
    • B29C66/90Measuring or controlling the joining process
    • B29C66/93Measuring or controlling the joining process by measuring or controlling the speed
    • B29C66/932Measuring or controlling the joining process by measuring or controlling the speed by measuring the speed
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B29WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29CSHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00General aspects of processes or apparatus for joining preformed parts
    • B29C66/90Measuring or controlling the joining process
    • B29C66/93Measuring or controlling the joining process by measuring or controlling the speed
    • B29C66/934Measuring or controlling the joining process by measuring or controlling the speed by controlling or regulating the speed
    • B29C66/93441Measuring or controlling the joining process by measuring or controlling the speed by controlling or regulating the speed the speed being non-constant over time
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B29WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29CSHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00General aspects of processes or apparatus for joining preformed parts
    • B29C66/90Measuring or controlling the joining process
    • B29C66/93Measuring or controlling the joining process by measuring or controlling the speed
    • B29C66/934Measuring or controlling the joining process by measuring or controlling the speed by controlling or regulating the speed
    • B29C66/93451Measuring or controlling the joining process by measuring or controlling the speed by controlling or regulating the speed by controlling or regulating the rotational speed, i.e. the speed of revolution
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B29WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29CSHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00General aspects of processes or apparatus for joining preformed parts
    • B29C66/90Measuring or controlling the joining process
    • B29C66/96Measuring or controlling the joining process characterised by the method for implementing the controlling of the joining process
    • B29C66/961Measuring or controlling the joining process characterised by the method for implementing the controlling of the joining process involving a feedback loop mechanism, e.g. comparison with a desired value
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B65CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65BMACHINES, APPARATUS OR DEVICES FOR, OR METHODS OF, PACKAGING ARTICLES OR MATERIALS; UNPACKING
    • B65B13/00Bundling articles
    • B65B13/18Details of, or auxiliary devices used in, bundling machines or bundling tools
    • B65B13/24Securing ends of binding material
    • B65B13/32Securing ends of binding material by welding, soldering, or heat-sealing; by applying adhesive
    • B65B13/327Hand tools
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B29WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29CSHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00General aspects of processes or apparatus for joining preformed parts
    • B29C66/70General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material
    • B29C66/71General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material characterised by the composition of the plastics material of the parts to be joined
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B29WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29KINDEXING SCHEME ASSOCIATED WITH SUBCLASSES B29B, B29C OR B29D, RELATING TO MOULDING MATERIALS OR TO MATERIALS FOR MOULDS, REINFORCEMENTS, FILLERS OR PREFORMED PARTS, e.g. INSERTS
    • B29K2101/00Use of unspecified macromolecular compounds as moulding material
    • B29K2101/12Thermoplastic materials
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B29WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29LINDEXING SCHEME ASSOCIATED WITH SUBCLASS B29C, RELATING TO PARTICULAR ARTICLES
    • B29L2023/00Tubular articles
    • B29L2023/005Hoses, i.e. flexible
    • B29L2023/007Medical tubes other than catheters
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B29WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29LINDEXING SCHEME ASSOCIATED WITH SUBCLASS B29C, RELATING TO PARTICULAR ARTICLES
    • B29L2031/00Other particular articles
    • B29L2031/727Fastening elements
    • B29L2031/7276Straps or the like
    • YGENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10TTECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T156/00Adhesive bonding and miscellaneous chemical manufacture
    • Y10T156/12Surface bonding means and/or assembly means with cutting, punching, piercing, severing or tearing

Abstract

Apparatus and methods for heat sealing thermoplastics strap material comprising a portable tool adapted to receive two sections of strap material which are to be welded together and having a heating element, means for moving the heating element betwen the straps and a battery source for supplying heating current to the heating element. A control circuit detects the battery voltage on load, and a drive circuit controls the movement of the heating element between the straps, to control the speed of the heating element in dependence on the detected voltage level, to compensate for decreasing battery voltage. The battery source is mountd in or on the tool housing for portability.The heating element is mounted on a carriage assembly mounted for reciprocal motion between the two straps and driven by an electric motor.A shaft encoder associated with the carriage drive generates electrical pulses the frequency of which is proportional to the speed, and the number of which is proportional to the distance moved by the carriage.Switch means is employed for turning the heating current on and off and is actuated by the presence of the heater carriage assembly at particular positions along the carriage assembly path, determined by microswitches or counting the pulses from the encoder.
EP85300966A 1984-02-16 1985-02-14 Improvements in apparatus for heat sealing thermoplastic straps Expired EP0152304B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT85300966T ATE27434T1 (en) 1984-02-16 1985-02-14 APPARATUS FOR HEAT SEALING THERMOPLASTIC TAPE.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
GB848404062A GB8404062D0 (en) 1984-02-16 1984-02-16 Heat sealing thermoplastic straps
GB8404062 1984-02-16

Publications (3)

Publication Number Publication Date
EP0152304A2 EP0152304A2 (en) 1985-08-21
EP0152304A3 true EP0152304A3 (en) 1985-09-18
EP0152304B1 EP0152304B1 (en) 1987-05-27

Family

ID=10556685

Family Applications (1)

Application Number Title Priority Date Filing Date
EP85300966A Expired EP0152304B1 (en) 1984-02-16 1985-02-14 Improvements in apparatus for heat sealing thermoplastic straps

Country Status (9)

Country Link
US (1) US4595433A (en)
EP (1) EP0152304B1 (en)
JP (1) JPS60189425A (en)
AT (1) ATE27434T1 (en)
CA (1) CA1222936A (en)
DE (1) DE3560195D1 (en)
DK (1) DK73485A (en)
ES (1) ES540451A0 (en)
GB (2) GB8404062D0 (en)

Families Citing this family (29)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CH664732A5 (en) * 1984-12-27 1988-03-31 Strapex Ag DEVICE FOR CONNECTING THE ENDS OF A THERMOPLASTIC PLASTIC TAPE.
CH665604A5 (en) * 1985-01-23 1988-05-31 Strapex Ag TENSIONING AND LOCKING DEVICE FOR PLASTIC TAPE.
JPH0312642Y2 (en) * 1987-10-12 1991-03-25
US5177340A (en) * 1989-01-23 1993-01-05 Cincinnati Milacron Inc. Control of radiant heating system for thermoplastic composite tape
US5146847A (en) * 1991-04-01 1992-09-15 General Motors Corporation Variable speed feed control and tensioning of a bander
KR100285696B1 (en) * 1992-12-16 2001-09-17 윌리엄 비. 켐플러 Cleaning method of patterned metal layer
US5632851A (en) * 1995-04-05 1997-05-27 Pantech International, Inc. Portable article strapping apparatus
US5809873A (en) * 1996-11-18 1998-09-22 Ovalstrapping, Inc. Strapping machine having primary and secondary tensioning units and a control system therefor
US5951902A (en) * 1997-12-29 1999-09-14 Kerotest Manufacturing Corp. Method and apparatus for electrofusing thermoplastic
US8652290B2 (en) * 2007-04-13 2014-02-18 David G. Haverty Systems and methods for manufacturing composite materials using thermoplastic polymers
US7598683B1 (en) 2007-07-31 2009-10-06 Lsi Industries, Inc. Control of light intensity using pulses of a fixed duration and frequency
US8903577B2 (en) 2009-10-30 2014-12-02 Lsi Industries, Inc. Traction system for electrically powered vehicles
US8604709B2 (en) 2007-07-31 2013-12-10 Lsi Industries, Inc. Methods and systems for controlling electrical power to DC loads
ATE552304T1 (en) 2008-01-02 2012-04-15 Flexopack Sa PVDC FORMULATION AND HEAT SHRINKABLE FILM
US8578992B2 (en) * 2008-02-22 2013-11-12 Kabushiki Kaisha Toyota Jidoshokki Friction welding apparatus
US20090302033A1 (en) * 2008-06-04 2009-12-10 Engineering & Research Associates, Inc. Automated hand held sealer
EP2520518B1 (en) 2011-05-03 2020-09-23 Flexopack S.A. Waste packaging device
DE202011110797U1 (en) * 2011-06-16 2016-08-10 Flexopack S.A. Waste packaging system and foil
US9272799B2 (en) * 2011-10-04 2016-03-01 Signode Industrial Group Llc Sealing tool for strap
US9604430B2 (en) 2012-02-08 2017-03-28 Flexopack S.A. Thin film for waste packing cassettes
AU2015258191B2 (en) 2014-11-19 2020-02-27 Flexopack S.A. Oven skin packaging process
WO2017030878A1 (en) 2015-08-14 2017-02-23 Crown Equipment Coproration Model based diagnostics based on traction model
KR102489196B1 (en) 2015-08-14 2023-01-17 크라운 이큅먼트 코포레이션 Model-based diagnosis based on steering model
US10577137B2 (en) 2015-12-09 2020-03-03 Signode Industrial Group Llc Electrically powered combination hand-held notch-type strapping tool
CN109963808B (en) 2017-01-13 2021-03-30 克朗设备公司 Traction speed recovery based on steering wheel dynamics
US10723382B2 (en) 2017-01-13 2020-07-28 Crown Equipment Corporation High speed straight ahead tiller desensitization
CH713646A2 (en) 2017-01-30 2018-09-28 Signode Ind Group Llc Strapping device with a clamping device.
EP3501822A1 (en) 2017-12-22 2019-06-26 Flexopack S.A. Fibc liner film
CN115352197B (en) * 2022-09-14 2023-09-19 济南阿波罗文化用品有限公司 Printer intelligence cloth breakage structure for ink test

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3755045A (en) * 1971-05-07 1973-08-28 M Takami Packing tape binding machine
US4063985A (en) * 1976-06-30 1977-12-20 Interlake, Inc. Heat-sealing strapping tool and temperature regulator therefor
EP0072132A1 (en) * 1981-08-05 1983-02-16 Interlake Uk Limited Apparatus for heat sealing of thermoplastics straps

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3397105A (en) * 1965-04-24 1968-08-13 Takami Masaho Tape fusing device
JPS5130517B2 (en) * 1972-08-30 1976-09-01
US4288270A (en) * 1979-06-04 1981-09-08 Interlake, Inc. Heat-sealing strapping machine
CA1197446A (en) * 1981-08-05 1985-12-03 Interloke Uk Limited Heat sealing of thermoplastics straps

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3755045A (en) * 1971-05-07 1973-08-28 M Takami Packing tape binding machine
US4063985A (en) * 1976-06-30 1977-12-20 Interlake, Inc. Heat-sealing strapping tool and temperature regulator therefor
EP0072132A1 (en) * 1981-08-05 1983-02-16 Interlake Uk Limited Apparatus for heat sealing of thermoplastics straps

Also Published As

Publication number Publication date
GB8503835D0 (en) 1985-03-20
GB8404062D0 (en) 1984-03-21
CA1222936A (en) 1987-06-16
DK73485D0 (en) 1985-02-15
JPS60189425A (en) 1985-09-26
GB2154175A (en) 1985-09-04
ES8602521A1 (en) 1985-12-01
ATE27434T1 (en) 1987-06-15
DK73485A (en) 1985-08-17
DE3560195D1 (en) 1987-07-02
GB2154175B (en) 1986-12-03
US4595433A (en) 1986-06-17
ES540451A0 (en) 1985-12-01
EP0152304A2 (en) 1985-08-21
EP0152304B1 (en) 1987-05-27

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